main power supply or UPC (Under-Bonnet Protection and Switching Unit) issue

[Add any other parts you've replaced, e.g., adblue injector or DPF sensor] The Problem:

Inspect the loom behind the battery and near the ECU for rubbing/chafing. CAN Resistance:

Dashboard light "Engine Failure Hazard," "Battery Charging Fault," and "Check ESC/Hill Start". The engine occasionally cuts out randomly when idling or while driving. What I’ve Done So Far: Replaced the battery (AGM). Checked alternator voltage (reading approx. 14.6v).